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Use of eugenol polyethers and eugenol polyether siloxanes as wetting agents

a technology which is applied in the field of use of eugenol polyether and eugenol polyether siloxanes as wetting agents, and can solve the problems of significant lowering of static surface tension, significant foaming, and large restriction of fluorinated surfactants us

Active Publication Date: 2018-06-12
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

These eugenol-based compounds effectively lower both static and dynamic surface tension, ensuring good wetting performance without foaming, while being safe for food contact and the environment, thus addressing the limitations of existing surfactants.

Problems solved by technology

They feature very significant lowering of the static surface tension, but have a significant tendency to foam.
Only recently, the use of fluorinated surfactants has been greatly restricted.
The half-life of these substances in the human body is very long, resulting in accumulation in the organism.
With these surfactants, it is possible to reduce both the static and dynamic surface tension, but the achievable values do not quite reach those for the nonionic and anionic surfactants.
A problem is the (eco)toxicological assessment of products based on 2,4,6,8-tetramethyl-5-decynediol.
The products lead to severe eye irritation, are classified as sensitizing on eye contact, and accumulate in water bodies.
It has been proven that the reactants of the ethoxylate surfactants used, i.e. octyl- and nonylphenol, interfere in the hormone metabolism of fish.
Owing to various regulations, however, the use thereof in printing food packaging is already forbidden.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

of a Eugenol-Based Polyether (Inventive)

[0281]A 5 liter autoclave was initially charged with 351 g of eugenol, and 100 ppm (based on the overall mixture) of a zinc hexacyanocobaltate double metal cyanide catalyst was added. The reactor was inertized by injecting nitrogen to 3 bar and subsequent decompression to standard pressure. This operation was repeated twice more. While stirring, the contents of the reactor were heated to 100° C. and evacuated to about 20 mbar to remove volatile components. After 30 min, the temperature was increased to 130° C. and 100 g of propylene oxide were metered into the evacuated reactor to activate the catalyst. The internal pressure at first rose to about 0.8 bar. The pressure began to drop slowly and had dropped to −0.1 bar after about 7 minutes. A further 50 g of PO were then metered in, and then the pressure rose to 0.8 bar once more. After 12 minutes, the pressure had dropped to −0.1 bar and a further 50 g of PO were metered in. Once the pressure ...

example 2

of a Eugenol-Based Polyether (Inventive)

[0282]A 5 liter autoclave was initially charged with 164.2 g of eugenol, and 100 ppm (based on the overall mixture) of a zinc hexacyanocobaltate double metal cyanide catalyst was added. The reactor was inertized by injecting nitrogen to 3 bar and subsequent decompression to standard pressure. This operation was repeated twice more. While stirring, the contents of the reactor were heated to 100° C. and evacuated to about 20 mbar to remove volatile components. After 30 min, the temperature was increased to 130° C. and 70 g of propylene oxide were metered into the evacuated reactor to activate the catalyst. The internal pressure at first rose to about 0.8 bar. The pressure began to drop slowly and had dropped to −0.4 bar after about 30 minutes. Slow, continuous addition of propylene oxide was then commenced. After addition of a further 56 g of PO the pressure rose to 0.7 bar and then dropped suddenly to −0.8 bar after addition of a total of 200 g...

example 3

of a Eugenol-Based Polyether (Inventive)

[0283]A 5 liter autoclave was initially charged with 544 g of eugenol, and 200 ppm (based on the overall mixture) of a zinc hexacyanocobaltate double metal cyanide catalyst was added. The reactor was inertized by injecting nitrogen to 3 bar and subsequent decompression to standard pressure. This operation was repeated twice more. While stirring, the contents of the reactor were heated to 80° C. and evacuated to about 20 mbar to remove volatile components. After 30 min, the temperature was increased to 140° C. and 80 g of propylene oxide were metered into the evacuated reactor to activate the catalyst. The internal pressure at first rose to about 0.6 bar. The pressure began to drop slowly and had dropped to −0.2 bar after about 10 minutes. A further 74 g of PO were then metered in which caused the pressure to drop slowly to −0.8 bar over 60 minutes. Metered addition of a mixture of 612 g of ethylene oxide and 691 g of propylene oxide was then c...

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Abstract

The present invention relates to compositions comprising eugenol polyethers and / or eugenol polyethers modified with siloxanes, and to the use of eugenol polyethers in polyether siloxanes based on these eugenol polyethers as wetting agents.

Description

BACKGROUND OF THE INVENTIONField of the Invention[0001]The present invention relates to compositions comprising eugenol polyethers and / or eugenol polyethers modified with siloxanes, and to the use of eugenol polyethers and polyether siloxanes based on these eugenol polyethers as wetting agents.Discussion of the Background[0002]Water-based inks and varnishes are used industrially on a large scale. A crucial factor for good wetting of the substrate is that the surface tension of the aqueous system is lowered with the aid of a surfactant. What is crucial here is that not just the static surface tension is lowered to a low value, but also the dynamic surface tension. More particularly, a low dynamic surface tension is required for high-speed applications, for example in the spray application of coatings or in the sector of printing processes. Furthermore, the surfactants used must not disrupt the formation of a homogeneous film and not cause any cloudiness, and should additionally be lo...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C09D4/00C09D11/03C08G65/48C08G77/46B01F17/00C09D11/107C08G65/40C09K23/00
CPCB01F17/0028C08G65/4087C08G65/48C09D11/03C09D11/107C08G77/46Y02P20/582C08G64/34C08G65/2603C08G65/42C08F216/1416C10M2229/04C09K23/54C09K23/42C08G65/2612C08G65/2648C08G65/2663C08G65/327C08G65/3322C08G65/337C09K23/00
Inventor ROLAND, KATRINLOBERT, MATTHIASFERENZ, MICHAELSCHIERLE, THORSTEN
Owner EVONIK OPERATIONS GMBH
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